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    <title>wigner</title>
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    <center>Scilab Function</center>
    <div align="right">Last update : April 1993</div>
    <p>
      <b>wigner</b> -  'time-frequency' wigner spectrum</p>
    <h3>
      <font color="blue">Calling Sequence</font>
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        <tt>[tab]=wigner(x,h,deltat,zp)  </tt>
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    <h3>
      <font color="blue">Parameters</font>
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    <ul>
      <li>
        <tt>
          <b>tab</b>
        </tt>: wigner spectrum (lines correspond to the time variable)</li>
      <li>
        <tt>
          <b>x</b>
        </tt>: analyzed signal</li>
      <li>
        <tt>
          <b>h</b>
        </tt>: data window</li>
      <li>
        <tt>
          <b>deltat</b>
        </tt>: analysis time increment (in samples)</li>
      <li>
        <tt>
          <b>zp</b>
        </tt>: length of FFT's. <tt>
          <b>%pi/zp</b>
        </tt> gives the frequency increment.</li>
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    <h3>
      <font color="blue">Description</font>
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    <p>
    function which computes the 'time-frequency' wigner
    spectrum of a signal.</p>
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